private void SplitTextIntoLines()
{
GameObject textLineObject = null;
RectTransform textLineTrans = null;
SpritedStringUI textLineComponent = null;
string textLine = null;
int textLineLength = 0;
int textLineIndex = -1;
float textLineWidth = 0f;
float interval = 0f;
float position = 0f;
int lineFirstIndex = -1;
int lineLastIndex = -1;
int lineLastIndexValid = -1;
int lineLastIndexNext = -1;
int lineLastIndexPrevious = -1;
bool lineReady = false;
bool allLinesReady = false;
bool spaceFound = false;
/*halmeida - to get one line I gotta create a long enough SpritedStringUI that fits
* exactly into the maxTextWidth. If I don't have enough characters to fill the width,
* I will just make a shorter line. The problem is that I'm able to see the width of a
* sprited string only after I set its value with all the characters it is supposed to
* have. Adding character by character to the SpritedString would be too slow, so I use
* a sort of bynary search, looking for the maximum valid size for each line.*/
if ((text != null) && (textLines == null) && (ownTransform != null))
{
textLineIndex = 0;
lineFirstIndex = 0;
lineLastIndex = text.Length - 1;
while (!allLinesReady)
{
lineLastIndexValid = -1;
interval = lineLastIndex - lineFirstIndex + 1;
position = lineFirstIndex + interval;
while (!lineReady)
{
if (textLineObject == null)
{
textLineObject = new GameObject("TextBoxUILine" + textLineIndex, typeof(RectTransform));
textLineTrans = textLineObject.GetComponent <RectTransform>();
/*halmeida - we should not add the lines as children of the object yet because the box
* image itself has not yet been added as a child of the object. The lines would get behind
* it if they were added now.*/
textLineComponent = textLineObject.AddComponent <SpritedStringUI>();
textLineComponent.SetSymbolSource(symbolDatabase);
}
textLineLength = lineLastIndex - lineFirstIndex + 1;
textLine = text.Substring(lineFirstIndex, textLineLength);
textLineWidth = symbolDatabase.GetStringWidthUI(textLine);
//Debug.Log("Debug : TextBoxUI : attempting text line width "+textLineWidth+".");
interval = interval / 2f;
if (textLineWidth > maxTextWidth)
{
position -= interval;
}
else
{
lineLastIndexValid = lineLastIndex;
position += interval;
}
lineLastIndexNext = (int)position;
/*halmeida - the position value itself should never be the same, but since it is rounded
* to an integer index, we may end up falling back to a previously checked index. When that
* happens, it means the interval has become small enough to stop the search.*/
if ((lineLastIndexNext == lineLastIndexPrevious) || (lineLastIndexNext == lineLastIndex) ||
(lineLastIndexNext > text.Length - 1))
{
if (lineLastIndexValid == -1)
{
/*halmeida - after all the searching, no valid size was found. This probably means
* the maxTextWidth is just too small to fit even one character. Even so we will
* forcibly accept a one character wide line.*/
lineLastIndexValid = lineFirstIndex;
}
if (lineLastIndexValid > lineFirstIndex)
{
/*halmeida - if there is more than one character in the line, we can check for
* word integrity. We cannot break a word into two lines. This means that the last
* character in a line that is not the last line has to be an empty space or the
* space has to be the first character in the next line.*/
if ((lineLastIndexValid + 1) < text.Length)
{
spaceFound = false;
for (int i = (lineLastIndexValid + 1); i > lineFirstIndex; i--)
{
if (text[i] == ' ')
{
lineLastIndexValid = i - 1;
spaceFound = true;
}
else
{
if (spaceFound)
{
break;
}
}
}
}
}
lineReady = true;
/*halmeida - we didn't necessarily end the search at a valid size, but the last valid
* size found is the biggest possible one. So we use that value to build the line.*/
textLineLength = lineLastIndexValid - lineFirstIndex + 1;
textLine = text.Substring(lineFirstIndex, textLineLength);
textLineComponent.SetValue(textLine);
textLineComponent.ToggleAllSymbolVisuals(false);
//Debug.Log("Debug : TextBoxUI : line "+textLineIndex+" is \""+textLine+"\".");
textLineWidth = textLineComponent.GetUIDimensions().x;
//Debug.Log("Debug : TextBoxUI : final text line width "+textLineWidth+".");
if (textLineWidth > maxLineWidth)
{
maxLineWidth = textLineWidth;
}
}
else
{
lineLastIndexPrevious = lineLastIndex;
lineLastIndex = lineLastIndexNext;
}
}
UsefulFunctions.IncreaseArray <string>(ref textLines, textLine);
UsefulFunctions.IncreaseArray <GameObject>(ref textLineObjects, textLineObject);
UsefulFunctions.IncreaseArray <RectTransform>(ref textLineTransforms, textLineTrans);
UsefulFunctions.IncreaseArray <SpritedStringUI>(ref textLineComponents, textLineComponent);
textLine = null;
textLineObject = null;
textLineTrans = null;
textLineComponent = null;
if (lineLastIndexValid == (text.Length - 1))
{
allLinesReady = true;
}
else
{
textLineIndex++;
lineFirstIndex = lineLastIndexValid + 1;
for (int i = lineFirstIndex; i < text.Length; i++)
{
if (text[i] == ' ')
{
lineFirstIndex++;
if (lineFirstIndex == text.Length)
{
allLinesReady = true;
}
}
else
{
break;
}
}
lineLastIndex = text.Length - 1;
lineReady = false;
}
}
}
}
